Compound emergency power supply apparatus used for low-temperature start of vehicle

Abstract

The invention discloses a compound emergency power supply apparatus used for low-temperature start of a vehicle. The compound emergency power supply apparatus comprises a lithium ion battery pack, voltage reduction circuits, a supercapacitor group, a voltage boosting circuit, voltage reduction driving circuits, a voltage boosting driving circuit, a main control chip MCU, signal acquisition modules, a 24V voltage output port and a 5V USB voltage output port, wherein the output ends of the signal acquisition modules are all connected with the main control chip MCU; the main control chip MCU is connected with the voltage reduction driving circuits and the voltage boosting driving circuit separately; the voltage reduction driving circuits are connected with the corresponding voltage reduction circuits; the voltage boosting driving circuit is connected with the voltage boosting circuit; the output end of the lithium ion battery pack, the voltage reduction circuit of the supercapacitor group, the supercapacitor group and the input end of the voltage boosting circuit are connected in series in sequence; the voltage reduction circuits are connected with the 24V voltage output port and the 5V USB voltage output port respectively; the output end of the voltage boosting circuit is connected with a vehicle storage battery; and the signal acquisition modules are also connected with the lithium ion battery pack, the supercapacitor group and the vehicle storage battery respectively.

Description

technical field [0001] The invention relates to the field of composite emergency power supply, in particular to a composite emergency power supply device for low-temperature starting of vehicles. Background technique [0002] When vehicles such as automobiles and tanks are used in high cold and low temperature environments, the discharge capacity of the vehicle battery is severely reduced due to the low temperature. When the vehicle is started, the battery power supply is insufficient and the number of ignitions is reduced, which may eventually cause the vehicle to fail to start normally. In order to start the vehicle, it is usually used to preheat the engine with a fire or pour hot water into the engine before starting. These methods are not only laborious and time-consuming, but also easy to cause fire if the operation is not done properly, which is very unsafe. [0003] Supercapacitors have large capacity, long service life, can be quickly charged and discharged with larg...

AI Technical Summary

Problems solved by technology

Gao Lijun disclosed a composite power supply device in "A Composite Power Supply Device Applicable to Lithium-Battery Supercapacitors". The disadvantage is that this device cannot be used for starting the vehicle at low temperature and as an emergency power supply

It is only a composite power supply composed of a supercapacitor and a vehicle battery connected in parallel. Although it makes up for the poor discharge capacity of the battery in a low-temperature environment, it needs to modify the internal battery circuit structure of the vehicle to install a new starting system, which increases the cost of the vehicle.

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